Closure frame



March 6, 1956 B, BLACQER 2,737,311

I CLOSURE FRAME Filed March 25, 1953 INVENTOR. BENJAMIN BLACH ER flaw/m, 152%,

I ATTORNEYS United States Patent 2,737,311 CLOSURE FRAME Benjamin Blacher, Providence, R. I., assignor to Blacher Brothers, Inc., a corporation of Rhode Island Application March 25, 1953, Serial No. 344,551 1 Claim. (Cl. 220-31) This invention relates to a closure frame for a box or the like and more particularly to the frame by which the cover is hinged to the body of the box.

Boxes are usually provided with some sort of a hinging means mounted upon the back wall of the body section and the cover section, which hinge is not well adapted to limit the opening movement of the cover from the box and consequently there is likely to be a rupture of the hinge connection to either the cover or the body section of the box.

One of the objects of this invention is to provide a means to limit the opening movement of the cover from the body so that the cover will stand at substantially right angles to the body in an upright position when the box is open.

Another object of this invention is to provide the frame and hinge means out of a minimum number of pieces of stock.

Another object of this invention is to provide two sections, one which will act as a frame for the body, and the other which will act as a frame for the cover and provide a hinging means with a finger which will act as a stop to limit the opening movement of the cover from the body of the box without the necessity of adding parts.

Another object of this invention is to provide the sections in identical form and by reversing the sections cause the stop which is provided at one end only of a U section to be on one part of a hinge at one of the hinge joints while it is on the other section at the other hinge joint.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a perspective view of a box equipped with this invention;

Figure 2 is a sectional view of the frame alone as removed from the remainder of the box;

Figure 3 is a fragmental elevation of the hinge joint;

Figure 4 is a section on line 44 of Figure 3;

Figure 5 is a plan view of a fragmental portion of a blanked-out frame prior to its being bent and showing the stop at the hinge joint.

In proceeding with this invention, I cut out from sheet stock blanks which are to become the frame of the box. Two of these blanks are identical, one serving for use on the cover of the box and the other on the body of the box. These frames are then bent into channel shape and the portions of the blank which project beyond one of the channel walls become the outer wall when the channel is bent into its general U shape. By reversing two of these sections and providing a finger on the hinge joint at the end of one leg, which is absent from the hinge joint at the end of the other leg, I enable the fingers to act at each of the joints by bending the finger over the hinge joint of the section to which it is pivoted so as to provide a good stop to limit hinging movement as the frame sections or the cover and body of the box are relatively swung from closed to open position.

With reference to the drawings, designates a blank as shown in Figure 5 which has the stock at one end 2,737,311 I Patented Mar. 6, 1956 projecting as at 11 to provide a hinge ear having an opening 12. A similar projection 13 extends from the other end of the blank and forms a similar hinge ear with an opening 14 therein. A finger 15 projects from this car 13 to act as a stop, as will presently appear.

The blank shown at 10 is bent along the dotted lines (Figure 5) into substantially channel shape, as may be seen in Figure 2 so that the shorter portion 16 becomes the inner wall 17, while the longer portion of the blank 18 becomes the outer wall 19 (see Figure 2) of the channel with a bridging portion 20 between these two walls. In some cases the inner wall 17 may be of a width a little greater than the width of the outer wall. The inner wall and bridging portion 20 are cut and then bent to provide right-angular corners 21 and 22 and form each of the frames into substantially a U shape with legs 23 and 24 as shown in Figure 2.

In this shape the cars 11 and 13 protrude beyond the ends of the inner wall 17 of each of the legs. By reversing these U-shaped sections, an ear 13 Will overlap the outer surface of an ear 11 of the other section, as shown in Figure 2, and in this relation a pivot pin such as a hollow rivet 25 with an enlarged head 26 is positioned through these ears (Figure 4) so as to hingedly relate them. Also the finger 15 is bent at its end over the edge of the car 11. This relationship also brings the fingers 15 in such a position that they slide along the peripheral edge of the ear 11 so that the fingers 15 will engage the end 27 of the outer wall 19 of the channel from Which the ear 11 projects as swinging movement occurs. The location of the finger 15 is such that the frame members may be swung from a position in substantial face-to-face contact of the bridging portion 20 through substantially degrees at which position these fingers will form a stop andprevent further movement.

Each of the channel sections may be slipped over the edge of a box, as shown in Figure l, where the channel section forms the upper edge of the front wall 28 of the body and the lower edge of the front wall 29 of the cover and also embraces the edges of the end walls 30 of the body and 31 of the cover. The body may be designated generally 32 and the cover generally 33, these being hinged together by the hollow rivets 25 and hinging relation of the frame sections just discussed.

I claim:

A closure frame comprising two identical sections each in substantially the shape of a U and of channel shaped cross section with spaced inner and outer walls connected by a bridge portion to receive the edges of the parts to be closed, the outer wall of the channel at the end of both U legs having integral projecting ears with the ears of one section overlapping and pivotally connected to the ears of the other section, each of said ears being ofiset inwardly from the outer edge of the outer wall forming an abutment shoulder extending at substantially right angles to the outer edge and substantially inline with said pivotal axis, said pivotal connection being in substantially the plane of the bridging portion, the ear at the end of only one leg of each section having an abutment finger extending at right angles to the plane of the ear and in line with the pivot axis and bottom of the channel to engage said abutment at the edge of the wall adjacent the ear on the other leg of each section and limit the opening movement of the sections to substantially ninety degrees.

References Cited in the file of this patent UNITED STATES PATENTS 702,650 Hazen June 17, 1902 1,788,490 Lewis Jan. 13, 1931 2,531,066 Lynch Nov. 21, 1950 2,620,084 Prew Dec. 2, 1952 

